The Federal Rules of Bankruptcy Procedure (FRBP) promulgated by the U.S. Supreme Court are published as an appendix to Title 11 of the U.S. Code, in the Rules volumes of Collier on Bankruptcy (Matthew Bender), in the Bankruptcy Procedure Manual: Federal Rules of Bankruptcy Procedure Annotated (West) and in CCH's Bankruptcy Law Reporter, among other places.
Editions are posted free online by the Legal Information Institute and the United States Courts.
The FRBP is searchable on Lexis (GENFED;BKRULE), in the general US-RULES database on Westlaw (add "& ci(frbp)" to the end of your search to limit your results to the FRBP) and in any online version of the U.S. Code (see "United States Code").
For cases interpreting the FRBP, use the version of the Rules published in the United States Code Annotated or the United States Code Service, or Shepardize the case on Lexis using the format: Bankr. R. [section #] . You can also KeyCite the section on Westlaw, but I think you have to pull up the section text and then click on the KeyCite link.
Proposed and recently-approved changes to the FRBP are posted in the Pending Rule Amendments section of the Federal Judiciary web site. For older approved changes, search Westlaw's US-ORDERS database (add "& ci(frbp)" to the end of your search to limit your results to FRBP changes).
Advisory Committee Notes on the FRBP are published in most editions of the United States Code (e.g., immediately following the Rule in the United States Code Annotated), in Collier on Bankruptcy (as an Appendix and the end of the discussion of each Rule) and in the Bankruptcy Procedure Manual: Federal Rules of Bankruptcy Procedure Annotated. In the free Legal Information Institute, you click on the "Notes" link at the end of each section.
Note: For Bankruptcy Appellate Panel rules, see "Federal Court Rules."